What happens when the U.S. Army wants a drug to enhance the performance of soldiers in combat? Gregory Barrow is assigned by McWhortle Laboratory to create the ZAP pill - a formula to increase the human body's testosterone level. But the mild mannered chemist doesn't realize the danger, or the black-market value, of his research.

Marleen Todd, Barrow's neighbor and co-worker, is on a much different mission - to create a new hormone-influenced fragrance that will revolutionize the perfume industry, moving beyond attraction to emotional effects.

As Barrow and Todd delve deeper into their work, they discover frightening side effects that could result in either the destruction or salvation of their already fragile family lives. And as a plot to steal the ZAP formula builds, the lives of everyone involved become intertwined as they seek to enhance their private pleasures.